Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    25-06-2024 01:08

General

  • Target

    4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.exe

  • Size

    4.9MB

  • MD5

    3ac2f5bab22f2fe2e738fd4b2c5714fe

  • SHA1

    772573778f0e6278013d7bd7b2835ea6f77d6211

  • SHA256

    4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190

  • SHA512

    9bf53430f2143cf2e0785841bb04e70f39f420623af42112d1f0fe715fa90d6a35fdffd3a6c3dcc07a63014f2133371588658a70a7420f021f22892d21690c12

  • SSDEEP

    98304:mNlkU2B4RMQ39hkxvmJhZ+SJW3wPt0dAlqOaA1JK5uDMume:fZMtVY33Y2deu91e

Malware Config

Extracted

Family

socks5systemz

C2

cccutzd.net

http://cccutzd.net/search/?q=67e28dd8380ffb281106fa1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978fe71ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff613c7e8929f3e

http://cccutzd.net/search/?q=67e28dd8380ffb281106fa1d7c27d78406abdd88be4b12eab517aa5c96bd86ec9d854d895a8bbc896c58e713bc90c91936b5281fc235a925ed3e5dd6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee9c983cca689313

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.exe
    "C:\Users\Admin\AppData\Local\Temp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4072
    • C:\Users\Admin\AppData\Local\Temp\is-37BEL.tmp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-37BEL.tmp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.tmp" /SL5="$5006A,4931557,54272,C:\Users\Admin\AppData\Local\Temp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:536
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:1948
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1140

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-37BEL.tmp\4af12d790d40f7c7cf55ef19da344147abab66ff16dcdb8fb24e0d577317f190.tmp

    Filesize

    680KB

    MD5

    c21e34336a7bd754b707115a82c1de90

    SHA1

    7ddee1b6647213e4379f34032981de74848c1c8c

    SHA256

    eb22af283ec53600b6138441900f0e28afeaf57d5ebe3cef7948a74f657660d1

    SHA512

    4c197f6ddb22ddac8271c63221ca443c65eb325a50c908c892c84b743041aa94a9c43c2991dfc82a2caa1e419ffea4e120dadd6386be324169fc470c8f52ba04

  • C:\Users\Admin\AppData\Local\Temp\is-VS3LR.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe

    Filesize

    3.0MB

    MD5

    1d0923d32c61776df2c362d70a79c8f9

    SHA1

    027602bf74fdf47b4a672fb2d4f3d37e10ee31d5

    SHA256

    b3868502f32392cddabce456346d7f2391bb9f58a2d38f4730d71746d644c4a6

    SHA512

    efd5804edeb39665aaeb825d1dc2701ce70419a812964806dd0e7d69b47face1a7e5906be818df0ff406f740bce9f7cc34e77e62122535d0b6eadbad17fd719b

  • memory/536-71-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/536-12-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1140-102-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-76-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-112-0x0000000000A80000-0x0000000000B22000-memory.dmp

    Filesize

    648KB

  • memory/1140-111-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-108-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-67-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-69-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-105-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-120-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-72-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-75-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-113-0x0000000000A80000-0x0000000000B22000-memory.dmp

    Filesize

    648KB

  • memory/1140-79-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-82-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-85-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-87-0x0000000000A80000-0x0000000000B22000-memory.dmp

    Filesize

    648KB

  • memory/1140-91-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-96-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-99-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1140-117-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1948-60-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1948-65-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1948-64-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/1948-59-0x0000000000400000-0x00000000006FA000-memory.dmp

    Filesize

    3.0MB

  • memory/4072-70-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4072-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4072-3-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB